The decision to kiss for the first time is the most crucial in any love story. It changes the relationship of two people much more strongly than even the final surrender; because this kiss already has within it that surrender.

In Lilless McPherson Shilling, Linda K. Fuller, Dictionary of Quotations in Communications (1997), p. 13. Most likely a variation of "Argument, again, is the death of conversation, if carried on in a spirit of hostility", William Hazlitt, Table Talk: Opinions on Books, Men, and Things (1846), p. 126